Chemist have developed a method of measuring the mass of an atom called what?

Mass Spectrometer Explanation: Using the mass spectrometry method we find the smallest atom. Even the heaviest atoms are only a hundred times heavier than this. There are different types of mass spectrometer all of which work on the same principle.There are three main parts in mass spectrometer: (1) Ion source (2) Mass analyser (3)Detector and recorder.

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.